Two, but how do they get in there?
A: Six. One to screw in the lightbulb and five to fend off all those Californians trying to share the experience.
None. People that glow in the dark don't need lights.
Two. One to put it in and one to complain that he never screws anything anymore.
NINE!
Put it in his honey.
Two, but I don't know how they got in there.